From 66e5674f0e048d0f192afd2be36725e0bf084d90 Mon Sep 17 00:00:00 2001 From: Chen-Yu Tsai Date: Tue, 5 May 2026 18:14:03 +0800 Subject: [PATCH] arm64: dts: mediatek: mt8195-cherry: Add supply for SPI NOR flash The SPI NOR flash is powered by a separate "always on" 1.8V LDO regulated power rail. This rail is fed from the system 3.3V rail. Signed-off-by: Chen-Yu Tsai Signed-off-by: AngeloGioacchino Del Regno --- arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi index dc1ba143ccf2..62e2d7616f20 100644 --- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi @@ -47,6 +47,17 @@ memory@40000000 { reg = <0 0x40000000 0 0x80000000>; }; + /* system critical LDO 1.8V power rail */ + pp1800_ldo_z2: regulator-pp1800-ldo-z2 { + compatible = "regulator-fixed"; + regulator-name = "pp1800_ldo_z2"; + regulator-always-on; + regulator-boot-on; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + vin-supply = <&pp3300_z2>; + }; + pp3300_disp_x: regulator-pp3300-disp-x { compatible = "regulator-fixed"; regulator-name = "pp3300_disp_x"; @@ -762,6 +773,7 @@ flash@0 { spi-max-frequency = <52000000>; spi-rx-bus-width = <2>; spi-tx-bus-width = <2>; + vcc-supply = <&pp1800_ldo_z2>; }; };